Coning, symmetry and spherical frameworks

Details Coning, symmetry and spherical frameworks Coning, symmetry and spherical frameworks

2011-08-10

arxiv.org/abs/1108.2174v1

Mathematics

Metric Geometry

38 pages, 7 figures

Scientific paper

In this paper, we combine separate works on (a) the transfer of infinitesimal rigidity results from an Euclidean space to the next higher dimension by coning, (b) the further transfer of these results to spherical space via associated rigidity matrices, and (c) the prediction of finite motions from symmetric infinitesimal motions at regular points of the symmetry-derived orbit rigidity matrix. Each of these techniques is reworked and simplified to apply across several metrics, including the Minkowskian metric $\M^{d}$ and the hyperbolic metric $\H^{d}$. This leads to a set of new results transferring infinitesimal and finite motions associated with corresponding symmetric frameworks among $\E^{d}$, cones in $E^{d+1}$, $\SS^{d}$, $\M^{d}$, and $\H^{d}$. We also consider the further extensions associated with the other Cayley-Klein geometries overlaid on the shared underlying projective geometry.

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